Exhaust system with O2 sensor
US8240128B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Feb 21, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2560/025
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention relates to an exhaust system having a riser adapted to be mounted to the exhaust inlet of a marine engine and a turndown connected to the riser. The riser and turndown define a primary exhaust passage to direct exhaust gases downwardly toward the discharge opening. A secondary passage, a tube, is integrated to the turndown within the primary exhaust passage. An O2 sensor is mounted within the tube. The tube has a diameter that is less than the diameter of the primary exhaust passage. With the diameter being less, the exhaust gases in the secondary passage have a pressure that is greater than in the primary exhaust passage which eliminates or at least reduces the ability for water to enter the secondary passage protecting the O2 sensor from damage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.